Acetylene-blowpipe.



H.4 H. SNYD-. AUETYLENE BLGF'LPIPE. APPLIUATION FILED' JUNE 5,1907.

912,590. Patent-,ed Feb. 16, 1909.

W'JTNESSES.-

ATTORNEYS "UNTTED sTATEs newline' n. sNYnEn, l

OF CLEVELAND, OHIO.

AcE'rYLnNn-Bnowrxrn.

Nea-912,500.

Speciicationof Letters Patent.V

Patented Feb. 1c, 1909.

' Application led June 5, 1907. Serial No. 377,319.

aicitizen 'of-.the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and seful Improvements in Acetylenef' Blowpi es, and do declare that'the following is a fu clear, and exact description ofthe invention, which will enable others skilled in the art to which it appertains to make and use the same.

My invention has referenceto acetylene blow pi es, and is an improvement more especia yvupon the style of blow pipe made and'invented by John Harris, of Cleveland, Ohio, and patented May 14, 1907, No. 853,634. The said patent com rises a bodyA member of tubular form an dilierential bore, the smaller diameter of which -is provided With a duct for mixing the acetylene and air and from which they issue as a mixture into a cup detachably secured tothe nozzle end of said body. 'Ihe said patented construction. has been found to be entirely practical and acceptable so far as I knowand believe, but has appeared to me to `be more elaborate and expensive than is really necessary to obtain goed and effective service, and for this reason I have sought to reduce a device which is materially simp fied in form and of fewer parts as well as being materially reduced in expense of manufacture, all as plainly shovm 1n the accompanying drawings and particularly pointed out in the claims.

Figure 1 represents a longitudinal sectional elevati n of the invention, and Fig. 2 is a front eevation thereof. Fig. 3 is a iront endelevation of the body of the pipe showing a modified form of perforations or openings in the diaphragm for the.passage of the acetylene from the chamber or space Within'.

As thus shown the device comprises a cylindrical body B preferably of the same cross section fromY end to end internally and externally and provided with a more or less solid'and closed'rear endb, into the center'of which I screw conducting pipe C for the supply of air and which terminates andis iixed at its opposite or outer end centrally in diaphragm D. Said diaphragm is located inward from the end or extremity of tube -B one-fifth to one-sixth its length, or at such distance as to provide a flange sustaining chamber o of Asuitable proportions just without the nozzle proper of the blower. Said nozzle, so called, may be regarded .asiixed by diaphragm D, throughy which the air and acetylenealike issue and commingleas they emerge outside the same, the acetylene issuing through perforations 2, Fig. 2, Aor slits or slots 3, Fig. 3, as either style is used, and the airis under artiiicial pressure up to this point', the pi F .having connection with the rear end o pipe or duct C, and pipe G for the acetylene dischar ing into annular space 4 about said pipe. t will be observed that as to these parts and the place and mannerof mixing the elements, there is material difcompared with said patent. In the patent the air and acetylene are mixed in an internal mixing duct, from which the mixture passes into the cup on the nozzle of the lower, but in the present construction the air passes through a duct of its own provided by pipes F and C and the acetylene enters through pipe G and the annular space 4 about ipe C in the body of the blower and orifices 2 or 3 as above described. The said orifices may incline more or less toward the center,'as in Fig. 1, or they may have a direct discharge into the flame chamber, both constructions giving good results.

The rimary, but not exclusive function of the sai chamber at the nozzle of the blower is to preserve a constant llame therein during operation. Otherwise the projection of the vflame under the usual pressure from within the blower would create such measure of atmospheric suction from about 'the sides at the mouth of the blower that it'would die out or be extinguished at said mouth and feate Any measure of vacuum created by the issuing gases and the projected tongue of flame out beyond said chamber is supplied by air that creeps in from about the front edge of the liame chamber, butdoes not interfere with the retention of the flame therein. However, be this as it may, I have demonstrated that a certain percentage of air and gas is trapped in chamber a which constantly maintains the workin llame regardless of the high pressures use in devices of this kind.

1; A blow-pipe for air and acetylenecomprising a cylindrical bodvhaving a diaphragm wall dividing said body between its ends into ference in the construction of the blower as ilows y ence through tle iinely divided jet the o eration of the blower would be de' a gas chamber and a ame chamber respectively, and an air tube centrally through said gas chamber having a vdischarge o ening centrally Within the diaphragm Wa and said Wall having sealed engagement with said cylindrical body and provided With gas orifices closely surrounding 'said air discharge opening and relatively near the axial center of said'body and adapted to yconverge the iioW of gas and air forA ignition and maintenance of i'lame centrally Within the body from the diaphragm Wall ouinfvard.`

2. A blow-pipe havlng air and acetylene connections and comprising a tubular body having adiaphragm l) engaged at its circumferential edge With said body and located inward from the end thereof to sealed gas chamber, a flame cham er in the rovi de a respective ends thereof, and ya central air tube C Within said body having a central discharge opening at said diaphragm, said diaphragm having a series of :fine gas orifices surrounding the said air vopening and relatively in close proximity thereto for converging the gas centrally Within the flame chamber of the body at the end thereof and apart from the surrounding Wall, and said air tube being spaced apart from the body to provide a gas chamber.

in testimony whereof I sign this specification in the presence of tWo Witnesses.

HOWARD H. SNYDER.

Witnesses: A

E. M. FISHER. R. B. MOSER., 

